http://www.bbc.co.uk/programmes/p03g12z8 (0:49)
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Beards hide antibiotic and can be good for your health
20 January 2016 Last updated at 12:52 GMT
Is there a disease-fighting antibiotic in your beard?
A test of beards found that some bacteria species can produce natural antibiotics living on men's faces.
Dr Adam Roberts told presenter Mishal Husain about the research and whether the bacterial species can produce natural antibiotics.